Water-tube boiler



(NoModeL) 2 Sheets-Sheet 1. D. SMITH & H. P. GOLDRIGK vWA'JTER TUBEBOILER.

.Patented Dec. 11,1894.

THE nonals PETERS 00.. vno'ro-pma. WASHXNGYON. n.

(No Model.) 2 sheets-sum 2. D. SMITH & H. P. GOLDRICK.

WATER TUBE BOILER.

Patented Dec. 1.1,

w vzesses. v mfiozzw THE uomus PETERS co. MD'TD-LITHO. wauluu'rcu o cFNITE'D STATES PATENT OFFICE.

DAVID SMITH, on WELLESLEY, AND HENRY P. GOLDRIOK, or NATICK,

- MASSACHUSETTS.

WAT ER-Tu B75 B01 L t-1R.-

SPECIFICATION forming part-of Letters Patent No. 530,664, dated Decemberl1, 1 894. Application filed July I1, 1894. Serial No. 517,180. (Nomodel.)

To all whom it may concern:

Be it known that we, DAVID SMITH, of Wellesley, county of Norfolk, andHENRY P. GOLDRIGK, of Natiok, county of Middlesex, State ofMassachusetts, have invented an Improvement in Water-Tube Boilers,of-which the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention has for its object to provide a novel water tubehorizontal boiler, and our invention consists in a boiler comprising topand bottom headers, the former furnishing a steam space above the waterline, and water tubes connecting the said headers, substantially as willbe described.

Our invention also comprehends the use'of water tables or partitionswithin .the boiler with openings therein to cause a circuitous passageof the products of combustion through the boiler to thereby moreuniformly heat all the tubes of the boiler.

In the drawings, Figure 1 represents in vertical longitudinal sectionour invention as applied to a locomotive boiler; Fig. 2, a verticalcross section of the same on the dotted line a:-w,' and Figs. 3 and 4vertical longi- Fig.3.

\ Referring to the drawings, in the particular embodiment of ourinvention there shown, A and B are the top and bottom headers ofsuitable shape and construction, the same being herein shown asconsisting of tube sheets a and I), along the edges of which aresuitably secured the edges of the crowning or curved sheets a, b. Thetwo headers are joined by a plurality of water tubes 0 having their endsexpanded or otherwise properly attached to the said tube sheets, as bestshown in Fig. 1.

In the preferred construction we provide the boiler at regular intervalswith water tables or partitions d made hollow, and in open communicationat their ends with the top and bottom headers in order that a freecirculation of water may be had at all times therethrough, each of thesaid partitions being providedwith a smoke opening 01, shown best inFig. 2, said openings in successive partitions'being staggered tocompel-a circuitous path of the products of combustion-from the furnaceD arranged atone end ofthe boiler,

as shown.

The furnace D may be of suitable or desired construction, we havingherein shown one surrounded by a water space d and provided with aninclined water table d having a central opening d through which theproducts of combustion are compelled to pass and be thereby morethroughly combined and .consumed.

F is a steam dome, shown as located immediately'over the crown sheet ofthe firebox, but which may be located farther forward on the top headerif desired, or thesaid steam dome may be omitted.

The sheet (1 closing the front end of the boiler between it and thesmoke arch is shown .as provided with a plurality of openings (1 for theexit of the products of combustion in the smoke arch, thence to thestack at". Referring now to Figs. 3 and 4, we have shown our inventionas adapted for a stationary boiler service, in which H, H, are the topand bottom headers connected by the water tubes h with the interposedwater partitions h provided with the smoke openings h, h, the lattershown only in the section Fig. 4.

In the modification Figs. 3 and 4, the furnace is shown within thecorrugated tube m, the products of combustion arising from the fire uponthe grate m passing over the bridge wall m, thence along and into theuptake 'm, shown as common totwo abutting furnaces, from which uptakethe products of combustion pass through the several openings W, asshown, and thence into the flue h leading to the chimney.

The boiler Figs. 3 and 4 may be set in de sired manner. 4

Our improved boiler presents a very large heating surface, the number oftubes possible to employ being much larger than in the ordinaryhorizontal tubular boiler. Its fiat sides permit a boiler ofconsiderable size to be located between the wheels of a locomotive, thedistance between which is restricted by the standard gage of railroads.

The boiler is simple in its construction and possesses great efficiency.

In practice, the sides of the boiler, Figs. 1 and 2, will be inclosed bythe side sheets at, n, and in Figs. 3 and 4, 0, 0, said sheets extendingbetween and being secured to the headers, and provided with suitablecleaning openings closed by doors, as shown. The Water line is indicatedabove the tube sheet of the top header, and between it and the crownsheet of the header is a steam space which may be varied in size bychanging the shape of said crown sheet.

This invention is, of course, not restricted to the particularconstruction and proportion of boiler here shown, for the same may bevaried Without departing from the spirit and scope of our invention.

We claim- A horizontal boiler comprising top and bottom headers, theformer having a steam space above the Water level, water tubesconnecting said headers, and water partitions interposed betweensections of the tubes through which water may circulate from one headerto the other, said water partitions being provided with smoke openingsstaggered in successive partitions to cause the products of combustionto pursue a continuous course and to thereby more efiectually impingeupon and heat the faces of said partitions, substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

DAVID SMITH. HENRY P. GOLDRIOK.

\Vitnesses:

CHAS. Q. TIRRELL, FORREST N. ADAMS.

